{"id":"67a6c006-3fbe-46a7-9074-2ba3b82c3000","title":"Path To Screensaver Binary Modified","description":"Detects value modification of registry key containing path to binary used as screensaver.","author":"Bartlomiej Czyz @bczyz1, oscd.community","status":"test","level":"medium","date":"2020-10-11","modified":"2021-11-27","tags":["attack.persistence","attack.privilege-escalation","attack.t1546.002"],"technique_ids":["T1546.002"],"logsource":{"category":"registry_event","product":"windows"},"falsepositives":["Legitimate modification of screensaver"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.002/T1546.002.md","https://www.welivesecurity.com/wp-content/uploads/2017/08/eset-gazer.pdf"],"source_path":"rules/windows/registry/registry_event/registry_event_modify_screensaver_binary_path.yml","source_sha256":"85feac35f6163ceb6d21e62e6e95d87271dc9f1dd87751315333bde90684944d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/registry/registry_event/registry_event_modify_screensaver_binary_path.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Path To Screensaver Binary Modified\nid: 67a6c006-3fbe-46a7-9074-2ba3b82c3000\nstatus: test\ndescription: Detects value modification of registry key containing path to binary used as screensaver.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.002/T1546.002.md\n    - https://www.welivesecurity.com/wp-content/uploads/2017/08/eset-gazer.pdf\nauthor: Bartlomiej Czyz @bczyz1, oscd.community\ndate: 2020-10-11\nmodified: 2021-11-27\ntags:\n    - attack.persistence\n    - attack.privilege-escalation\n    - attack.t1546.002\nlogsource:\n    category: registry_event\n    product: windows\ndetection:\n    selection:\n        TargetObject|endswith: '\\Control Panel\\Desktop\\SCRNSAVE.EXE' # HKEY_CURRENT_USER\\Control Panel\\Desktop\\SCRNSAVE.EXE\n    filter:\n        Image|endswith:\n            - '\\rundll32.exe'\n            - '\\explorer.exe'\n    condition: selection and not filter\nfalsepositives:\n    - Legitimate modification of screensaver\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1546.002","id":"T1546.002","name":"Screensaver","page":"techniques/enterprise/T1546.002/"}],"data_path":"data/detection-rules/67a6c006-3fbe-46a7-9074-2ba3b82c3000.json","kind":"sigma"}